4. Blue on Blue rooftop garden.

4. Blue on Blue rooftop garden.

Gary Friedman, Los Angeles Times

Hoffman spent 10 months researching rooftop gardening before convincing the general manager of the hotel to let him invest $550 in the project. To start, he planted seedlings that lend themselves to garnishes  mache, basil and mint.

Hoffman spent 10 months researching rooftop gardening before convincing the general manager of the hotel to let him invest $550 in the project. To start, he planted seedlings that lend themselves to garnishes  mache, basil and mint. (Gary Friedman, Los Angeles Times)

Hoffman spent 10 months researching rooftop gardening before convincing the general manager of the hotel to let him invest $550 in the project. To start, he planted seedlings that lend themselves to garnishes  mache, basil and mint.